Americus v



A. V. JEWETT.

(No Model'.)

LOOK.

No. 542,563. Patented July 9,1895.

. INVENTLOR M if WITNESSES ATENT OFF CE.

AMERICUS V. JEWETT, OF ABILENE, KANSAS.

LOCK.

gPECIFICATION forming part of Letters Patent N0. 542,563, dated July 9,1895. Application filed February 9, 1895. Serial No, 537,329. {Nomodel.) i

To aZZ whom it may concern.-

Be it known that I, AMERIOUS V. JEWETT, a citizen of the United States,residing at Abilene, in the county of Dickinson and State of Kansas,have invented certain new and useful Improvements in Locks, of whichthefollowing is a specification.

My invention relates io'improvements in looks, and its object is toprovide additional safeguards or protection to certain forms of locksnow very commonly used.

By reason of an extensive series of burglaries committed in the localityWhere I reside my attention has been drawn to defects in certain kindsof locks. It has been found that most doors fitted with springnight-latchesthat is, spring-actuated latches having bevmoved from thedoor.

eled outer ends-could be opened from the outside by the insertion of oneor more thin pieces of steel in the interstice between the door and thedoor-jamb,'or between the doors in the case of double doors.

The object of my invention is to render any such manipulation of thelock impossible.

My invention therefore consists in the novel construction, combination,and arrangement of the parts for this purpose, hereinafter fullyspecified, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a view of the interior of thebolt-casin g re- Fig. 2 is a view of its exterior. Fig. 3 is a viewofthe inner side of the casing-plate. Fig. 4 is a View of its outer sideor the side in contact with the door. Fig. 5 is a horizontal sectionthrough the lock and a portion of the door and door-jamb adjacentthereto, and Figs. 6, 7, 8, 9, and are detail views. I

Referring to the drawings, 1 represents the door and 2 the door-jamb.

3 is the bol,tcasing, and 4 the casing-plate.

5 is the bolt-socket.

6 is a common Yale lock secured to the casing-plate by screws in thewell-known manner.

7 is the locking-tongue vibrated by means of the key through themechanism of the lock and its end entering a groove 8 in the head 9 of astem 10, passing through a bearingin the casing-plate, upon theprojecting end of which is secured a cam 11, having camfingers 12.Likewise through the casing 3, opposite to the stem 10, passes a stem13, upon the outer endot which is secured a milled head or knob 14, andon the innenend is a cam 15, similar to the cam 11 and having [ingers16. The cam-fingers 12 and 16 contact with upper and lower arms 17 of anextension or cross head 18 on the end of the bolt-stem 19 which slidesin a bearing 20 supported upon the casing, and carries the bolt-head 21,adapted to be projected into the socket 5. A spiral spring 22 surroundsthe bolt-stem 19 and presses at one end against the bolt-head and at theother against a plate 23 supported against the bearing 20, thus servingto project the bolt forward out of the casing when not otherwiserestrained.

To retain the bolt within the casing, an arm 24 is provided pivoted onthe casing, preferably at the base of the bearing 20, and having afinger 25 projecting outwardly through an elongated aperture 26 in thecasing, whereby said arm may be vibrated on its pivot, and having a stud27, projecting inwardly and adapted to enter a recess 28 on the face ofthe bolt-head when the bolt is withdrawn, and so retain the bolt withinthe casing,

The construction hitherto specified is old and well known and forms nopart of my invention, which I will now particularly describe.

29 represents a protecting plate or shield, and I preferably form thisas of three sides of a rectangle in cross-section,so as to inclose thebolt on its outersurface and top and bottom. The shield 29has a wing 30extending downwardly and outwardly on each side, and upon said wings aresecured rods or stems 31, the other ends of which pass through holes 32in a plate 33, which is recessed centrally to lie over the stem 19, andis supported by the bearing 20 againstthe pressure of the spiral springs34, encircling the stems 31 and pressing at their other ends against thewings 30, thus serving to project the shield 29 out of the casing unlessthe latter be otherwise restrained. To hold the shield within the easingwhen the door is opened there is provided a rod 35, moving through anaperture 36 in the plate 4, the end of the rod resting upon a rearwardextension 36 of the shield29 when said shield projects fromthe casin gand lying ICO in the path of a circular perforation 37 through saidshield, into which when said shield is pressed backward into the casingsaid rod is projected by means of a spring 38, pressing upward the endof a short lever 39, pivoted upon a standard 40, the other end of saidlever being jointed at 41 to said rod 35. The inner surface of the dooris recessed at 42, near its edge, to receive the rod 35, spring 38,lever 39,and standard 40, and its edge is also recessed at 43 to receivea small casing 44, having at its lower end abearing 45 for a push-rod46, which is adapted to press upon the end of the lever 39 opposite thespring 38, but is normally pressed outward by the spiral spring 47, oneend of which spring rests upon said bearing and the other is secured tosaid push-rod. A stop 48 is reinovably secured to the door-jainb, havinga projecting piece adapted upon the closing of the door to come incontact with the end of the push-rod 46, pushing the same inward.

The operation of the device will be readily understood from thedisclosure of its construction. Upon withdrawing the bolt 21, either bythe key or by the knob 14, the bolthead, abutting against thedownwardly-bent portions of the protecting-plate 29, will carry itbackward with itself until the perforation 37 comes underneath the endof the rod 35, whereupon said rod will be forced ,by the spring 38 intosaid perforation and will actas a detent to withhold the shield withinthe easing, the bolt, however, being free to project outwardly under thepressure of the spring 27 upon the cessation of the force which withdrewit, no change having been made in the lock in this respect. Thus uponthe closing of the door the bolt itself will first be projected into itslocking position in the usual manner, and then upon the end of thepushrod 46 coming in contact with the stop 48 said contact, through thelever 39, will raise the rod 35 out of the perforation 37 and permit theshield 29 to spring forward under pressure from the springs 34.

If found desirable, the stop 48 may be removed and the shield releasedby pressure on the finger at will upon the end of the pushbutton 46. a

I have also devised stationary shields to be interposed between the boltand the outside of the door. One of these I have shown in the form of anarrow plate 49 let into the edge of the door, and another as a similarplate 50 let into the edge of the casing, either or both serving toprevent access from the outside to the beveled surface of the bolt tomanipulate the same.

Having thus'fully described my invention, what I claim, and desire tosecure by Letters Patent, is

1. In a door-lock, the combination, with a bolt, bolt casing, and boltsocket, of a movable protecting plate or shield adapted to project fromthe edge of the door in front of the bolt, said shield being engaged bysaid bolt and moved inwardly therewith when the latter is withdrawn, andmeans for projecting said shield, independent of the means forprojecting the bolt, substantially as described.

2. In a door-lock, the combination, with a bolt, bolt casing, and boltsocket, of a spring actuated protecting plate or shield adapted toproject from the edge of the door in front of the bolt when projectedfrom its casing, whereby access can not be had to said bolt from theoutside when the door is closed, substantially as described.

3. In a door-lock, the combination, with a bolt, a bolt casing, and abolt socket, of a movable plate or shield adapted to be projected pastthe edge of the casing and interposed in front of the end of said boltwhen projected from its casing, whereby access can not be had to saidbolt from the outside when the door is closed, a spring for projectingsaid shield, an d a push rod for releasing said spring, substantially asdescribed.

4. In a door-lock, the combination, with a bolt, a bolt casing, and boltsocket, of a protecting plate or shield adapted to project from the edgeof the door in front of the bolt when the latter is in its lockingposition, whereby access can not be had to said bolt from the out sidewhen. the door is closed, operative mechanism for projecting saidshield, and a stop on the door-jatnb coming into engagement with saidoperative mechanism when the door is closed and actuating the same toproject said shield, Substantially as described.

5. In a door-lock, the combination, with a bolt, a bolt casing, and boltsocket, of a protecting plate or shield adapted to project from the edgeof the door in front of the bolt when the latter is in its lockingposition, whereby access can not be had to said bolt from the outsidewhen the door is closed, a spring de tent restraining said shield withinsaid casing when the door is open, a trip arranged to trip said detentto release said shield, and a stop on the door-jamb engaging said tripon the closing of the door to project said. shield, substantially asdescribed.

AMERICUS V. J EWETT.

lVitnesses:

GEO. W. Hum), N. G. STAMBAUGH.

lCt

IIC

